#include <inttypes.h>
#include <limits>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>


#include "algorithm/crc.h"

namespace util {
    namespace detail {

        /* CRC16 implementation according to CCITT standards.
         *
         * Note by @antirez: this is actually the XMODEM CRC 16 algorithm, using the
         * following parameters:
         *
         * Name                       : "XMODEM", also known as "ZMODEM", "CRC-16/ACORN"
         * Width                      : 16 bit
         * Poly                       : 1021 (That is actually x^16 + x^12 + x^5 + 1)
         * Initialization             : 0000
         * Reflect Input byte         : False
         * Reflect Output CRC         : False
         * Xor constant to output CRC : 0000
         * Output for "123456789"     : 31C3
         */

        static const uint16_t crc16_tab[256] = {
            0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50a5, 0x60c6, 0x70e7, 0x8108, 0x9129, 0xa14a, 0xb16b, 0xc18c, 0xd1ad, 0xe1ce, 0xf1ef,
            0x1231, 0x0210, 0x3273, 0x2252, 0x52b5, 0x4294, 0x72f7, 0x62d6, 0x9339, 0x8318, 0xb37b, 0xa35a, 0xd3bd, 0xc39c, 0xf3ff, 0xe3de,
            0x2462, 0x3443, 0x0420, 0x1401, 0x64e6, 0x74c7, 0x44a4, 0x5485, 0xa56a, 0xb54b, 0x8528, 0x9509, 0xe5ee, 0xf5cf, 0xc5ac, 0xd58d,
            0x3653, 0x2672, 0x1611, 0x0630, 0x76d7, 0x66f6, 0x5695, 0x46b4, 0xb75b, 0xa77a, 0x9719, 0x8738, 0xf7df, 0xe7fe, 0xd79d, 0xc7bc,
            0x48c4, 0x58e5, 0x6886, 0x78a7, 0x0840, 0x1861, 0x2802, 0x3823, 0xc9cc, 0xd9ed, 0xe98e, 0xf9af, 0x8948, 0x9969, 0xa90a, 0xb92b,
            0x5af5, 0x4ad4, 0x7ab7, 0x6a96, 0x1a71, 0x0a50, 0x3a33, 0x2a12, 0xdbfd, 0xcbdc, 0xfbbf, 0xeb9e, 0x9b79, 0x8b58, 0xbb3b, 0xab1a,
            0x6ca6, 0x7c87, 0x4ce4, 0x5cc5, 0x2c22, 0x3c03, 0x0c60, 0x1c41, 0xedae, 0xfd8f, 0xcdec, 0xddcd, 0xad2a, 0xbd0b, 0x8d68, 0x9d49,
            0x7e97, 0x6eb6, 0x5ed5, 0x4ef4, 0x3e13, 0x2e32, 0x1e51, 0x0e70, 0xff9f, 0xefbe, 0xdfdd, 0xcffc, 0xbf1b, 0xaf3a, 0x9f59, 0x8f78,
            0x9188, 0x81a9, 0xb1ca, 0xa1eb, 0xd10c, 0xc12d, 0xf14e, 0xe16f, 0x1080, 0x00a1, 0x30c2, 0x20e3, 0x5004, 0x4025, 0x7046, 0x6067,
            0x83b9, 0x9398, 0xa3fb, 0xb3da, 0xc33d, 0xd31c, 0xe37f, 0xf35e, 0x02b1, 0x1290, 0x22f3, 0x32d2, 0x4235, 0x5214, 0x6277, 0x7256,
            0xb5ea, 0xa5cb, 0x95a8, 0x8589, 0xf56e, 0xe54f, 0xd52c, 0xc50d, 0x34e2, 0x24c3, 0x14a0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405,
            0xa7db, 0xb7fa, 0x8799, 0x97b8, 0xe75f, 0xf77e, 0xc71d, 0xd73c, 0x26d3, 0x36f2, 0x0691, 0x16b0, 0x6657, 0x7676, 0x4615, 0x5634,
            0xd94c, 0xc96d, 0xf90e, 0xe92f, 0x99c8, 0x89e9, 0xb98a, 0xa9ab, 0x5844, 0x4865, 0x7806, 0x6827, 0x18c0, 0x08e1, 0x3882, 0x28a3,
            0xcb7d, 0xdb5c, 0xeb3f, 0xfb1e, 0x8bf9, 0x9bd8, 0xabbb, 0xbb9a, 0x4a75, 0x5a54, 0x6a37, 0x7a16, 0x0af1, 0x1ad0, 0x2ab3, 0x3a92,
            0xfd2e, 0xed0f, 0xdd6c, 0xcd4d, 0xbdaa, 0xad8b, 0x9de8, 0x8dc9, 0x7c26, 0x6c07, 0x5c64, 0x4c45, 0x3ca2, 0x2c83, 0x1ce0, 0x0cc1,
            0xef1f, 0xff3e, 0xcf5d, 0xdf7c, 0xaf9b, 0xbfba, 0x8fd9, 0x9ff8, 0x6e17, 0x7e36, 0x4e55, 0x5e74, 0x2e93, 0x3eb2, 0x0ed1, 0x1ef0};

        static const uint32_t crc32_tab[256] = {
            0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4,
            0xe0d5e91e, 0x97d2d988, 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, 0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de,
            0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, 0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9,
            0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172, 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,
            0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59, 0x26d930ac, 0x51de003a,
            0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
            0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190, 0x01db7106, 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f,
            0x9fbfe4a5, 0xe8b8d433, 0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01,
            0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950,
            0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65, 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2,
            0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0, 0x44042d73, 0x33031de5,
            0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
            0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6,
            0x03b6e20c, 0x74b1d29a, 0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, 0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8,
            0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1, 0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb,
            0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc, 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5,
            0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b, 0xd80d2bda, 0xaf0a1b4c,
            0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
            0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31,
            0x2cd99e8b, 0x5bdeae1d, 0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713,
            0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, 0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242,
            0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777, 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c,
            0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45, 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2, 0xa7672661, 0xd06016f7,
            0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
            0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8,
            0x5d681b02, 0x2a6f2b94, 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d,
        };

#ifndef UINT64_C
#define UINT64_C(x) static_cast<uint64_t>(x##ULL)
#endif

        static const uint64_t crc64_tab[256] = {
            UINT64_C(0x0000000000000000), UINT64_C(0x7ad870c830358979), UINT64_C(0xf5b0e190606b12f2), UINT64_C(0x8f689158505e9b8b),
            UINT64_C(0xc038e5739841b68f), UINT64_C(0xbae095bba8743ff6), UINT64_C(0x358804e3f82aa47d), UINT64_C(0x4f50742bc81f2d04),
            UINT64_C(0xab28ecb46814fe75), UINT64_C(0xd1f09c7c5821770c), UINT64_C(0x5e980d24087fec87), UINT64_C(0x24407dec384a65fe),
            UINT64_C(0x6b1009c7f05548fa), UINT64_C(0x11c8790fc060c183), UINT64_C(0x9ea0e857903e5a08), UINT64_C(0xe478989fa00bd371),
            UINT64_C(0x7d08ff3b88be6f81), UINT64_C(0x07d08ff3b88be6f8), UINT64_C(0x88b81eabe8d57d73), UINT64_C(0xf2606e63d8e0f40a),
            UINT64_C(0xbd301a4810ffd90e), UINT64_C(0xc7e86a8020ca5077), UINT64_C(0x4880fbd87094cbfc), UINT64_C(0x32588b1040a14285),
            UINT64_C(0xd620138fe0aa91f4), UINT64_C(0xacf86347d09f188d), UINT64_C(0x2390f21f80c18306), UINT64_C(0x594882d7b0f40a7f),
            UINT64_C(0x1618f6fc78eb277b), UINT64_C(0x6cc0863448deae02), UINT64_C(0xe3a8176c18803589), UINT64_C(0x997067a428b5bcf0),
            UINT64_C(0xfa11fe77117cdf02), UINT64_C(0x80c98ebf2149567b), UINT64_C(0x0fa11fe77117cdf0), UINT64_C(0x75796f2f41224489),
            UINT64_C(0x3a291b04893d698d), UINT64_C(0x40f16bccb908e0f4), UINT64_C(0xcf99fa94e9567b7f), UINT64_C(0xb5418a5cd963f206),
            UINT64_C(0x513912c379682177), UINT64_C(0x2be1620b495da80e), UINT64_C(0xa489f35319033385), UINT64_C(0xde51839b2936bafc),
            UINT64_C(0x9101f7b0e12997f8), UINT64_C(0xebd98778d11c1e81), UINT64_C(0x64b116208142850a), UINT64_C(0x1e6966e8b1770c73),
            UINT64_C(0x8719014c99c2b083), UINT64_C(0xfdc17184a9f739fa), UINT64_C(0x72a9e0dcf9a9a271), UINT64_C(0x08719014c99c2b08),
            UINT64_C(0x4721e43f0183060c), UINT64_C(0x3df994f731b68f75), UINT64_C(0xb29105af61e814fe), UINT64_C(0xc849756751dd9d87),
            UINT64_C(0x2c31edf8f1d64ef6), UINT64_C(0x56e99d30c1e3c78f), UINT64_C(0xd9810c6891bd5c04), UINT64_C(0xa3597ca0a188d57d),
            UINT64_C(0xec09088b6997f879), UINT64_C(0x96d1784359a27100), UINT64_C(0x19b9e91b09fcea8b), UINT64_C(0x636199d339c963f2),
            UINT64_C(0xdf7adabd7a6e2d6f), UINT64_C(0xa5a2aa754a5ba416), UINT64_C(0x2aca3b2d1a053f9d), UINT64_C(0x50124be52a30b6e4),
            UINT64_C(0x1f423fcee22f9be0), UINT64_C(0x659a4f06d21a1299), UINT64_C(0xeaf2de5e82448912), UINT64_C(0x902aae96b271006b),
            UINT64_C(0x74523609127ad31a), UINT64_C(0x0e8a46c1224f5a63), UINT64_C(0x81e2d7997211c1e8), UINT64_C(0xfb3aa75142244891),
            UINT64_C(0xb46ad37a8a3b6595), UINT64_C(0xceb2a3b2ba0eecec), UINT64_C(0x41da32eaea507767), UINT64_C(0x3b024222da65fe1e),
            UINT64_C(0xa2722586f2d042ee), UINT64_C(0xd8aa554ec2e5cb97), UINT64_C(0x57c2c41692bb501c), UINT64_C(0x2d1ab4dea28ed965),
            UINT64_C(0x624ac0f56a91f461), UINT64_C(0x1892b03d5aa47d18), UINT64_C(0x97fa21650afae693), UINT64_C(0xed2251ad3acf6fea),
            UINT64_C(0x095ac9329ac4bc9b), UINT64_C(0x7382b9faaaf135e2), UINT64_C(0xfcea28a2faafae69), UINT64_C(0x8632586aca9a2710),
            UINT64_C(0xc9622c4102850a14), UINT64_C(0xb3ba5c8932b0836d), UINT64_C(0x3cd2cdd162ee18e6), UINT64_C(0x460abd1952db919f),
            UINT64_C(0x256b24ca6b12f26d), UINT64_C(0x5fb354025b277b14), UINT64_C(0xd0dbc55a0b79e09f), UINT64_C(0xaa03b5923b4c69e6),
            UINT64_C(0xe553c1b9f35344e2), UINT64_C(0x9f8bb171c366cd9b), UINT64_C(0x10e3202993385610), UINT64_C(0x6a3b50e1a30ddf69),
            UINT64_C(0x8e43c87e03060c18), UINT64_C(0xf49bb8b633338561), UINT64_C(0x7bf329ee636d1eea), UINT64_C(0x012b592653589793),
            UINT64_C(0x4e7b2d0d9b47ba97), UINT64_C(0x34a35dc5ab7233ee), UINT64_C(0xbbcbcc9dfb2ca865), UINT64_C(0xc113bc55cb19211c),
            UINT64_C(0x5863dbf1e3ac9dec), UINT64_C(0x22bbab39d3991495), UINT64_C(0xadd33a6183c78f1e), UINT64_C(0xd70b4aa9b3f20667),
            UINT64_C(0x985b3e827bed2b63), UINT64_C(0xe2834e4a4bd8a21a), UINT64_C(0x6debdf121b863991), UINT64_C(0x1733afda2bb3b0e8),
            UINT64_C(0xf34b37458bb86399), UINT64_C(0x8993478dbb8deae0), UINT64_C(0x06fbd6d5ebd3716b), UINT64_C(0x7c23a61ddbe6f812),
            UINT64_C(0x3373d23613f9d516), UINT64_C(0x49aba2fe23cc5c6f), UINT64_C(0xc6c333a67392c7e4), UINT64_C(0xbc1b436e43a74e9d),
            UINT64_C(0x95ac9329ac4bc9b5), UINT64_C(0xef74e3e19c7e40cc), UINT64_C(0x601c72b9cc20db47), UINT64_C(0x1ac40271fc15523e),
            UINT64_C(0x5594765a340a7f3a), UINT64_C(0x2f4c0692043ff643), UINT64_C(0xa02497ca54616dc8), UINT64_C(0xdafce7026454e4b1),
            UINT64_C(0x3e847f9dc45f37c0), UINT64_C(0x445c0f55f46abeb9), UINT64_C(0xcb349e0da4342532), UINT64_C(0xb1eceec59401ac4b),
            UINT64_C(0xfebc9aee5c1e814f), UINT64_C(0x8464ea266c2b0836), UINT64_C(0x0b0c7b7e3c7593bd), UINT64_C(0x71d40bb60c401ac4),
            UINT64_C(0xe8a46c1224f5a634), UINT64_C(0x927c1cda14c02f4d), UINT64_C(0x1d148d82449eb4c6), UINT64_C(0x67ccfd4a74ab3dbf),
            UINT64_C(0x289c8961bcb410bb), UINT64_C(0x5244f9a98c8199c2), UINT64_C(0xdd2c68f1dcdf0249), UINT64_C(0xa7f41839ecea8b30),
            UINT64_C(0x438c80a64ce15841), UINT64_C(0x3954f06e7cd4d138), UINT64_C(0xb63c61362c8a4ab3), UINT64_C(0xcce411fe1cbfc3ca),
            UINT64_C(0x83b465d5d4a0eece), UINT64_C(0xf96c151de49567b7), UINT64_C(0x76048445b4cbfc3c), UINT64_C(0x0cdcf48d84fe7545),
            UINT64_C(0x6fbd6d5ebd3716b7), UINT64_C(0x15651d968d029fce), UINT64_C(0x9a0d8ccedd5c0445), UINT64_C(0xe0d5fc06ed698d3c),
            UINT64_C(0xaf85882d2576a038), UINT64_C(0xd55df8e515432941), UINT64_C(0x5a3569bd451db2ca), UINT64_C(0x20ed197575283bb3),
            UINT64_C(0xc49581ead523e8c2), UINT64_C(0xbe4df122e51661bb), UINT64_C(0x3125607ab548fa30), UINT64_C(0x4bfd10b2857d7349),
            UINT64_C(0x04ad64994d625e4d), UINT64_C(0x7e7514517d57d734), UINT64_C(0xf11d85092d094cbf), UINT64_C(0x8bc5f5c11d3cc5c6),
            UINT64_C(0x12b5926535897936), UINT64_C(0x686de2ad05bcf04f), UINT64_C(0xe70573f555e26bc4), UINT64_C(0x9ddd033d65d7e2bd),
            UINT64_C(0xd28d7716adc8cfb9), UINT64_C(0xa85507de9dfd46c0), UINT64_C(0x273d9686cda3dd4b), UINT64_C(0x5de5e64efd965432),
            UINT64_C(0xb99d7ed15d9d8743), UINT64_C(0xc3450e196da80e3a), UINT64_C(0x4c2d9f413df695b1), UINT64_C(0x36f5ef890dc31cc8),
            UINT64_C(0x79a59ba2c5dc31cc), UINT64_C(0x037deb6af5e9b8b5), UINT64_C(0x8c157a32a5b7233e), UINT64_C(0xf6cd0afa9582aa47),
            UINT64_C(0x4ad64994d625e4da), UINT64_C(0x300e395ce6106da3), UINT64_C(0xbf66a804b64ef628), UINT64_C(0xc5bed8cc867b7f51),
            UINT64_C(0x8aeeace74e645255), UINT64_C(0xf036dc2f7e51db2c), UINT64_C(0x7f5e4d772e0f40a7), UINT64_C(0x05863dbf1e3ac9de),
            UINT64_C(0xe1fea520be311aaf), UINT64_C(0x9b26d5e88e0493d6), UINT64_C(0x144e44b0de5a085d), UINT64_C(0x6e963478ee6f8124),
            UINT64_C(0x21c640532670ac20), UINT64_C(0x5b1e309b16452559), UINT64_C(0xd476a1c3461bbed2), UINT64_C(0xaeaed10b762e37ab),
            UINT64_C(0x37deb6af5e9b8b5b), UINT64_C(0x4d06c6676eae0222), UINT64_C(0xc26e573f3ef099a9), UINT64_C(0xb8b627f70ec510d0),
            UINT64_C(0xf7e653dcc6da3dd4), UINT64_C(0x8d3e2314f6efb4ad), UINT64_C(0x0256b24ca6b12f26), UINT64_C(0x788ec2849684a65f),
            UINT64_C(0x9cf65a1b368f752e), UINT64_C(0xe62e2ad306bafc57), UINT64_C(0x6946bb8b56e467dc), UINT64_C(0x139ecb4366d1eea5),
            UINT64_C(0x5ccebf68aecec3a1), UINT64_C(0x2616cfa09efb4ad8), UINT64_C(0xa97e5ef8cea5d153), UINT64_C(0xd3a62e30fe90582a),
            UINT64_C(0xb0c7b7e3c7593bd8), UINT64_C(0xca1fc72bf76cb2a1), UINT64_C(0x45775673a732292a), UINT64_C(0x3faf26bb9707a053),
            UINT64_C(0x70ff52905f188d57), UINT64_C(0x0a2722586f2d042e), UINT64_C(0x854fb3003f739fa5), UINT64_C(0xff97c3c80f4616dc),
            UINT64_C(0x1bef5b57af4dc5ad), UINT64_C(0x61372b9f9f784cd4), UINT64_C(0xee5fbac7cf26d75f), UINT64_C(0x9487ca0fff135e26),
            UINT64_C(0xdbd7be24370c7322), UINT64_C(0xa10fceec0739fa5b), UINT64_C(0x2e675fb4576761d0), UINT64_C(0x54bf2f7c6752e8a9),
            UINT64_C(0xcdcf48d84fe75459), UINT64_C(0xb71738107fd2dd20), UINT64_C(0x387fa9482f8c46ab), UINT64_C(0x42a7d9801fb9cfd2),
            UINT64_C(0x0df7adabd7a6e2d6), UINT64_C(0x772fdd63e7936baf), UINT64_C(0xf8474c3bb7cdf024), UINT64_C(0x829f3cf387f8795d),
            UINT64_C(0x66e7a46c27f3aa2c), UINT64_C(0x1c3fd4a417c62355), UINT64_C(0x935745fc4798b8de), UINT64_C(0xe98f353477ad31a7),
            UINT64_C(0xa6df411fbfb21ca3), UINT64_C(0xdc0731d78f8795da), UINT64_C(0x536fa08fdfd90e51), UINT64_C(0x29b7d047efec8728),
        };

    } // namespace detail

    LIBATFRAME_UTILS_API uint16_t crc16(const unsigned char *s, size_t l, uint16_t init_val) {
        if (!s) {
            return init_val;
        }
        size_t j;
        for (j = 0; j < l; ++j) {
            unsigned char byte = s[j];
            init_val           = (init_val << 8) ^ detail::crc16_tab[((init_val >> 8) ^ (uint16_t)byte) & 0x00FF];
        }
        return init_val;
    }

    LIBATFRAME_UTILS_API uint32_t crc32(const unsigned char *s, size_t l, uint32_t init_val) {
        if (!s) {
            return init_val;
        }
        size_t j;
        for (j = 0; j < l; ++j) {
            unsigned char byte = s[j];
            init_val           = detail::crc32_tab[static_cast<unsigned char>(init_val) ^ (uint32_t)byte] ^ (init_val >> 8);
        }

        return init_val;
    }

    LIBATFRAME_UTILS_API uint64_t crc64(const unsigned char *s, size_t l, uint64_t init_val) {
        if (!s) {
            return init_val;
        }
        size_t j;
        for (j = 0; j < l; ++j) {
            unsigned char byte = s[j];
            init_val           = detail::crc64_tab[static_cast<unsigned char>(init_val) ^ (uint64_t)byte] ^ (init_val >> 8);
        }

        return init_val;
    }
} // namespace util
